What does the team need that can they can afford AND will impact the season?
I'm not a Kemba fan, but his contract will be unmovable, so the next obvious place for a major upgrade is center.
Whiteside? Major headcase, major talent, playing for pennies.
Drummond? Major talent, major expiring contract.
The other usual suspects aren't worth the trouble.
Whiteside makes sense from a low cost/low risk/high reward sense.